Reland of "Mojo interface/service for Leak Detector on remote process"

components/metrics/leak_detector/BUILD.gn

Index: components/metrics/leak_detector/BUILD.gn
diff --git a/components/metrics/leak_detector/BUILD.gn b/components/metrics/leak_detector/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..03d904a7459ce0cfd46e5da587403e21dbfa2215
--- /dev/null
+++ b/components/metrics/leak_detector/BUILD.gn
@@ -0,0 +1,65 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//mojo/public/tools/bindings/mojom.gni")
+
+if (is_chromeos) {
+  # GYP version: components/metrics.gypi:metrics_leak_detector
+  source_set("leak_detector") {
+    sources = [
+      "call_stack_manager.cc",
+      "call_stack_manager.h",
+      "call_stack_table.cc",
+      "call_stack_table.h",
+      "custom_allocator.cc",
+      "custom_allocator.h",
+      "leak_analyzer.cc",
+      "leak_analyzer.h",
+      "leak_detector.cc",
+      "leak_detector.h",
+      "leak_detector_impl.cc",
+      "leak_detector_impl.h",
+      "leak_detector_value_type.cc",
+      "leak_detector_value_type.h",
+      "protobuf_to_mojo_converter.cc",
+      "protobuf_to_mojo_converter.h",
+      "ranked_set.cc",
+      "ranked_set.h",
+    ]
+
+    deps = [
+      ":interfaces",
+      "//base",
+      "//components/metrics/proto:proto",
+    ]
+  }
+
+  mojom("interfaces") {
+    sources = [
+      "leak_detector.mojom",
+    ]
+  }
+
+  source_set("unit_tests") {
+    testonly = true
+    sources = [
+      "call_stack_manager_unittest.cc",
+      "call_stack_table_unittest.cc",
+      "leak_analyzer_unittest.cc",
+      "leak_detector_impl_unittest.cc",
+      "leak_detector_unittest.cc",
+      "protobuf_to_mojo_converter_unittest.cc",
+      "ranked_set_unittest.cc",
+    ]
+
+    deps = [
+      ":interfaces",
+      ":leak_detector",
+      "//base",
+      "//components/metrics/proto:proto",
+      "//content/test:test_support",
+      "//testing/gtest",
+    ]
+  }
+}